Who is this a picture of?
I am not a native speaker and it�s my first time to see this question structure. Is this commonly used?
Here is another explanation:
the picture of Britney Spears
the daughter of my sister
the high-lighted phrases are called prepositional phrases (OF-phrases expressing possession)
your question should begin with �whose �
don �t confuse it with phrasal verbs ending in OF
e.g.:
think of
take care of
in this case you can begin with who
Q:_________________?
A: I am thinking of you.
correct Q: Who are you thinking of?
This sounds right to me...???..
following your question structure, doesn�t the Q below sound weird?
Q: Who do you need an opinion of?
A:I need an opinion of a native speaker.
shouldn�t it be
Whose opinion do you need?